Valve for internal-combustion engines



M. J. SMITH VALVE FOR INTERNAL COMBUSTION ENpmzs Filed Oct. 15. 1923 Patented May 4, 1926., A I i i nuir'so was PATIENT osFicE.

Application filed October 15, 1923. Serial No. 668,585.

' To all whom it mZa-g concern: an approximate angle of forty-five degrees. Be it known that I. Mrnnn J. SMITH, a A more efiective response to increases of citizen of the United States, residing at pressure is found to result from giving the Redford, in the county of Wayne and State vanes 3 an arcuate rather than a strictly 65 5 of Michigan, have invented a new and useradial form. Said vanes are extended outful- Valve for Internal-Combustion Engines, wardly to the periphery of the valve, and of whichthe following is a specification. at their inner ends terminate a short dis- This invention relates to valves and partance from the valve center. i ticularly to tappet valves for internal com- When said vanes are properly propor- 60 bustion engines. tioned, each increase of gaseous pressure,

It is the object of the invention to effect resulting either fromexplosion or compresa gradual rotative creeping of the valves sion of the mixture in the cylinder controlled upon their seats when an engine of the speciby the valve, creates a momentary unbalfied character is in operation, utilizing the anced pressure upon the faces 4. and 5' of the 65 i recurrent changes of pressure upon the top valve resulting in a slight rotative advance faces of the valves to effect such a movement, of the valve upon its seat in the direction whereby a continuous automatic grinding of the arrow (see Fig. 3). This momentary of the valves to their seats is accomplished lack of balance between the pressure on the and any carbon lodging upon the valve seats vane faces .4 and 5 follows from the fact that 70 or seating surface of the valves is at once pressure acting-perpendicularly upon the removed, top face of the valve has a circumferential In attaining this object, the invention concomponent, as applied to the inclined faces templates providing upon the top faces of 5, while such pressure is not effective upon the valves a series of approximately radial the faces 4:, since the latter are parallel to 7 5 vanes of such form that rotative impulses the direction of such pressure. This condiin one direction will be imparted to the tion of unbalanced pressure exists only at valves by the sudden increases of gaseous the moment of the initial sudden rise of such pressure acting against said vanes during pressure, and consequently the rotative rethe explosion and compression strokes. spouse of the valve to each explosion or 80 A preferred embodiment of the invention compression. is quite slight. This frequently is hereinafter described. and is illustrated in recurring slight advance is suflicient, howthe accompanying drawing, wherein, ever, to secure the desired grinding effect,

Fig. 1 is a side view of the improved valve thus eliminating the periodic manual grindindicating in dash lines the seat-forming ing which is required by such valves as have 85 portion of an engine valve. heretofore been employed.

Fig. 2 is a view of the valve in sectional -What I claim is: elevation. 1. A tappet valve having a plurality 0 Fig. 3 is a top view of the valve. approximately radial vanes upon its top In these views the reference character 1 surface, each of said vanes having opposite 90 40 designates a tappet valve and 2 the stem faces, one of which is perpendicular to said.

thereof, the general form of said valve 10 surface and the other inclined at an acute ing that which is in common use for controlangle to said surface. ling the intake and exhaust ports of internal 2. The method of insuring proper seating combustion engines. The present invention of an mternal combustion englne valve com- 95 consists in forming upon the outer face "of prising lntermlttently and gradually rotatsuch a valve (that is to say, the face r mote ing the valve by fluid pressure while the from the stem 2) a series of approximately. valve is fully seated, during operation of radial vanes 3, each having a triangular the engine. V cross-section with one face t perpendicular 3. The method of insuring proper seating 10? 59 to the top surface of the valve, and another of an internal combustion engine-valve conface 5 inclined to said surface preferably at sisting in utilizing pressure ofthe gas controlled by said valve to effect a gradual rotative actuation of the valve While fully seated during operation of the engine.

4. The combination with an internal combustion engine valve chamber, of a valve comprising a stem and a head terminally carried by said stem, said head seating within said chamber and having aplurality of nseaeas faces upon its outer surface and Within said chamber extending substantially radially inward from the rim of said valve and inclined at an acute angle to the valve axis.

In testimony whereof I sign this specification. 

